Re: [Plplot-devel] Get mouse position without action

[<jc...@fe...>]

On Tuesday 05 November 2002 07:34, chenu-tournier marc wrote:
| Hello
|
| I would like to get the mouse position without wating of a action
| from the user. Is that possible?
| Thanks.
| Marc

Yes. Not easy. From xwin.c:

/*-----------------------------------------------------------------------=
---*\
 * MasterEH()
 *
 * Master X event handler routine.
 * Redirects control to routines to handle:
 *    - keyboard events
 *    - mouse events
 *    - expose events
 *    - resize events
 *
 * By supplying a master event handler, the user can take over all event
 * processing.  If events other than those trapped by PLplot need=20
handling,
 * just call XSelectInput with the appropriate flags.  The default=20
PLplot
 * event handling can be modified arbitrarily by changing the event=20
struct.
\*-----------------------------------------------------------------------=
---*/

static void
MasterEH(PLStream *pls, XEvent *event)
{
  XwDev *dev =3D (XwDev *) pls->dev;
 =20
  if (dev->MasterEH !=3D NULL)
    (*dev->MasterEH) (pls, event);  <---------- user supplied, I think.
 =20
  switch (event->type) {


Or, if the the Caps-Lock key is locked, then "x01c -dev xwin -locate"=20
works!

Joao